寻找哪个<Option>被选中<select>（没有 JQuery）

Question

I have the following Element:

<select id="color" name="colorId" class="btn secondary">
    <option value="347366" selected="selected">Purple</option>
    <option value="56634">White</option>
</select>

And I want to find which option is selected:

The following give me only the default:

document.querySelector('#color option[selected="selected"]')

(I know how to do it with JQuery but, I can't use jQuery or any other similar library)

Answer 1

Use the :checked selector. This applies to checkbox, radio, and select

document.querySelector('#color option:checked')

for the node

document.querySelector('#color option:checked').value

for the value

Answer 2

In plain javascript:

var select = document.getElementById('color');
var currentOpt = select.options[select.selectedIndex]; 

JsBin example: http://jsbin.com/ogunet/1/edit (open your js console)

Answer 3

This will return selected option value and text both.. Hope this will work for u ..

Cheers

var elt = document.getElementById('color');

 // get option selected
    var option = elt.options[elt.selectedIndex].value;
    var optionText = elt.options[elt.selectedIndex].text;

Answer 4

Grab the <select> DOM element using getElementById() and take its parameter selectedIndex :

var select = document.getElementById( 'color' ),
    selIndex = select.selectedIndex;,
    selElement = select.getElementsByTagName( 'option' )[ selIndex ];

Answer 5

You can do this with querySelectorAll not querySelector

document.querySelectorAll('option:checked')[0].innerText

or

document.querySelectorAll('option:checked')[0].value

Answer 6

selectedOptions is a valid option when looking to get back the selected option(s) from a select element

a demo from the documentation:

 let orderButton = document.getElementById("order"); let itemList = document.getElementById("foods"); let outputBox = document.getElementById("output"); orderButton.addEventListener("click", function() { let collection = itemList.selectedOptions; // <-- used here let output = ""; for (let i=0; i<collection.length; i++) { if (output === "") { output = "Your order for the following items has been placed: "; } output += collection[i].label; if (i === (collection.length - 2) && (collection.length < 3)) { output += " and "; } else if (i < (collection.length - 2)) { output += ", "; } else if (i === (collection.length - 2)) { output += ", and "; } } if (output === "") { output = "You didn't order anything!"; } outputBox.innerHTML = output; }, false);

 <label for="foods">What do you want to eat?</label><br> <select id="foods" name="foods" size="7" multiple> <option value="1">Burrito</option> <option value="2">Cheeseburger</option> <option value="3">Double Bacon Burger Supreme</option> <option value="4">Pepperoni Pizza</option> <option value="5">Taco</option> </select> <br> <button name="order" id="order"> Order Now </button> <p id="output"> </p>